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What are the four basic welding positions?

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Description : Describe the basic SHA operation with the help of its four mode specifications.

Answer : Sample-and-hold amplifier (SHA) is a unity gain amplifier with a mode control switch where the input of the amplifier is connected to a time-varying signal. A trigger pulse at the mode control switch ... but other forms, such as optical and mechanical forms, are possible. Also denoted S/H.

Description : What are the different types of welding?

Description : What is undercut defect in welding?

Description : For arc welding current range is usually  (1) 10 to 15 A (2) 30 to 40 A (3) 50 to 100 A (4) 100 to 350 A

Answer : For arc welding current range is usually 100 to 350 A

Description : Spot welding is used for (1) Thin metal (3) Castings only (2) Rough and irregular surface (4) Thick sections

Answer : Spot welding is used for Thin metal

Description : Identify the correct combination of respective Electric arc welding and Electric resistance welding methods :  (A) Butt welding and Seam welding  (B) Hydrogen shielding and Projection welding  (C) Seam welding and Coated electrode welding  (D) Coated electrode welding and Hydrogen shielding

Answer : Identify the correct combination of respective Electric arc welding and Electric resistance welding methods :  (A) Butt welding and Seam welding  (B) Hydrogen shielding and Projection welding  ... Seam welding and Coated electrode welding  (D) Coated electrode welding and Hydrogen shielding

Description : The electrode rod used for welding uses a coating on it 

Answer : The electrode rod used for welding uses a coating on it  to give a vapour to serve as a shielding gas to protect the weld area from atmospheric contamination and to provide slag to protect the welded area

Description : The supply for arc welding is : 

Answer : The supply for arc welding is : Low voltage, high current ac or dc voltage

Description : State the four advantages of MIG welding.  

Answer : Four advantages of MIG welding: 1. High quality welds can be produced much faster. 2. Flux is not used there is no chance for the entrapment of slag in the weld metal resulting in high quality ... of metals and alloys. 5. Least expensive and highly economic. 6. Little or no post welds cleaning.

Description : What are the basic requirements of locating wind power plant ?

Answer : The basic requirements of locating wind power plant:  1) The site should be selected where winds are strong i.e. where pressure of wind is high and there is continuity. 2) Wind pressure ... the turbine which can affect the system's overall performance. 10)Possibility to connect to power grid. 

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Description : Explain with sketch electron beam welding. 

Answer : Electron Beam Welding Process In EBW process, the heat is generated when the electron beam impinges on work piece. As the high velocity electron beam strikes the surfaces to be welded, their kinetic ... material that is directly in the path is melted which when solidifies form the joint. 

Description : List two special feature of welding transformer.

Answer : Special features of welding transformer: i) It is a step down transformer that reduces the source voltage to a voltage desired according to the demands of the welding process. ii) Having large primary turns and less ... V ii) Secondary voltage - 40 to 60 V iii) Secondary current - 200 to 600 A

Description : Welding Defects 

Answer : Welding Defects  Welding defects Explanation and causes 1. Cracks Cracks occur when localized stresses exceed the ultimate tensile strength of material. These stresses are developed due to shrinkage ... Too fast a travel, Bad welding technique, Too great a heat build-up.

Description : State the applications of TIG welding.

Answer : The applications of TIG welding are as follows: 1. Mostly used to weld aluminum and aluminum alloys. 2. It is used to weld stainless steel, carbon base alloy, copper base alloy, nickel base alloy etc. 3. It is used to welding dissimilar metals. 4. It is mostly used in aerospace industries.

Description : Describe with a neat diagram, the process of any one type of electric welding. 

Answer : Methods of electric welding :  1. Resistance welding  i Butt welding  ii Spot welding  iii Seam welding  iv Projection welding  2. Arc Welding  i Carbon arc welding  ii ... as copper, iron etc. The electric arc effectively concentrate heat on the surfaces it is desired to join.

Description : Compare between Resistance welding and Arc welding on any six points.

Answer : Sr.No Parameters Resistance Welding Arc Welding 1 Type of welding Plastic/Pressure/Non-fusion welding Fusion/Non pressure welding 2 Principle of heat developed Heat ... It is suitable for mass production It is suitable for heavy job, maintenance and repair work

Answer : Welding generator will have lap winding.

Description : What is the basic use of capacitor?

Description : What is the basic function of a capacitor?

Description : What is basic insulation level?

Description : what is the difference between four point starter and three point starter?

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Description : Basic Circuit Elements Symbols

Answer : Basic Circuit Elements Symbols

Description : Numbers Basic Math Review

Description : Basic Circuit Elements

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Description : Basic idea of generation 

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Description : Electrical quantities (symbol and basic unit)

Answer : Electrical quantities (symbol and basic unit)

Description : Basic SI units

Answer : Basic SI units

Description : 1.Determine the permeability of magnetic material by plotting its BH curve 2. Measure voltage, current and power in 1-phase circuit with resistive load. 3. Measure voltage, current and ... .Make Star and Delta connection in induction motor starters and measure the line and phase values.

Answer : Practical no. 6 Aim: Make Star and Delta connection in induction motor starters and measure the line and phase values. Apparatus required:  voltmeter, ammeter, induction motor Circuit diagram ... Result: Hence we have measured the line and phase value of star and delta connection.

Answer : In a circuit breaker the basic problem is to transmit large power.

Description : Explain the basic operation of an oscilloscope with necessary diagram for each section in detail.

Description : basic gate drive circuit of GTO

Answer : basic gate drive circuit of GTO

Description : State any Four lE Rules regarding electric safety. 

Answer :  lE Rules regarding electric safety: 1. IE Rule 3 : Authorization 2. IE Rule 29 : Construction and maintenance of electrical supply line and apparatus 3. IE Rule 30: Service line and apparatus on ... 26. IE Rule 60: Test for resistance of insulation 27. IE Rule 61: Connection with earth 

Description : Explain any four properties of Moulding sand. 

Answer : 1. Porosity: Molten metal always contain a certain amount of dissolved gases, which are evolved when the metal freezes the molten metal coming in contact with the moist sand , generates steam or ... to the casting. Refractoriness is measured by the sinter point of the sand rather than its melting

Description : List any four casting defects.

Answer : The various types of casting defects are as follows: 1. Gas Porosity: Blowholes, open holes, pinholes. 2. Shrinkage defects: shrinkage cavity. 3. Mold material defects: Cut and washes, ... Pouring metal defects: Cold shut, misrun, slag inclusion. Metallurgical defects: Hot tears, hot spot.

Description : List any four materials used for pattern making

Answer : The various types of materials used are as follows: 1. Wood 2. Metal. 3. Plastic. 4. Plaster. 5. Wax.

Description : List any four accessories used on lathe.

Answer : The various accessories used in lathe are as follows. 1) Lathe centers 2) Carriers or driving dog 3) catch plates 4) Chucks 5) Face plates 6) Angle plates 7) Mandrels 8) Rests

Description : State any four advantages of LC filter.

Answer : 1. The choke input (LC) filter has a high output D.C voltage. 2. It has no loading effect on the rectifier and power transformer.  3. The diode does not have to carry surge currents.  ... effect on the rectifier and power transformer.  7. It has better voltage regulation than that of π filter.

Description : A four -quadrant operation requires two full converters connected in  (1) Series (3) Back to back (2) Parallel (4) Series Cascade

Answer : A four-quadrant operation requires two full converters connected in Parallel 

Description : Four Quadrant Operation Of DC Motor

Answer : Four Quadrant Operation Of DC Motor

Description : The commonly used gases in tungsten arc welding are 1.Hydrogen and oxygen 2.Hydrogen and organ 3.Hydrogen and helium 4.Helium and argon

Answer : The commonly used gases in tungsten arc welding are Helium and argon

Description : Electric welding equipment works best at  A) Low voltage and low current B) Low Voltage and high current C) High voltage and low current D) High voltage and high current

Answer : Electric welding equipment works best at Low Voltage and high current 

Description : In which of the following welding methods, the molten metal is poured for joining the metals ?   (a) Gas welding (b) Thermit welding (c) TIG welding (d) Arc welding 

Answer : In which of the following welding methods, the molten metal is poured for joining the metals ?   (a) Gas welding (b) Thermit welding (c) TIG welding (d) Arc welding 

Description : What are two Cabinet-level positions? Choose one: a. Secretary of Defense and Secretary of State b. Governor of New York and Governor of California c. First Lady and White House Spokesperson d. President of the Senate and Speaker of the House

Answer : Correct Answer: a. Secretary of Defense and Secretary of State

Description : "Unless you are willing to drench yourself in your work beyond the capacity of the average man, you are just not cut out for positions at the top." - J.C. Penny

Description : List four advantage of welding.

Answer : Advantages of welding process 1) It produce permanent joint. 2) Large number of metals can be welded. 3) Freedom in design. 4) Strong and tight joining 5) Cost effectiveness 6) Simplicity of welded structures design 7) Welding processes may be mechanized and automated

Description : State any four applications of resistance welding. 

Answer : Answer: Applications of resistance welding: 1. Resistance welding is widely used in automotive industries. 2. Projection welding is widely used in production of nut and bolt. Projection welding is ... welding is applied in manufacturing of wheel rims, wire joints and railway track joints etc. 

Description : State four advantages of welding.

Answer : Advantages of Welding Process: 1) It produce permanent joint. 2) Large number of metals can be welded. 3) Freedom in design. 4) Strong and tight joining 5) Cost effectiveness 6) Simplicity of welded structures design 7) Welding processes may be mechanized and automated.

Description : State four advantages of seam welding over spot welding.

Answer : Advantages of seam welding over spot welding:- 1. Due to seam welding we get continuous weld which is air-tight 2. Gas tight as well as liquid tight joints can be made. 3. The Overlap is ... . The production of single seam weld and parallel seams can be got simultaneously. 5. Efficient energy use.

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